def load_history():
history_file = os.path.join(tempfile.gettempdir(), get("history"))
if not os.path.exists(history_file):
return []
pdebug("load data from %s", history_file)
return json.load(open(history_file))
def pick_fastest_ping(hosts):
history_data = load_history()
fastest_score = sys.maxint
fastest_host = None
curr_data = {"time": int(time.time())}
queue = Queue.Queue()
m_sys_ping = QueueWrap(queue)(sys_ping)
threads = []
for host in hosts:
# 调用系统命令，不需要 root 权限即可进行 ping 测试
t = threading.Thread(name=host, target=m_sys_ping, args=(host,),
kwargs={"count": 10, "psize": 512})
t.daemon = True
t.start()
threads.append(t)
for t in threads:
t.join()
while queue.qsize() > 0:
try:
r = queue.get()
host, loss, artt = r
except Queue.Empty, _:
continue
if artt is None:
artt = 9999
score = net_score(loss, artt)
overall_score = calc_overall_score(host, score, history_data)
pdebug("%s, loss: %d%%, rtt: %d, score: %d, overall_score: %d",
host, loss, artt, score, overall_score)
curr_data[host] = {"loss": loss, "rtt": artt, "score": score}
if overall_score < fastest_score:
fastest_host = host
fastest_score = overall_score
